Emplyee Contribution Health Scheme. Query

Dear Sir,
I am an Ex-Serviceman.
I was a Sgt in Indian Air Force and retired from force on 31 Jul 2004 after serving for 20 years.
Presently I am an employee of Container Corporation of India Ltd , a PSU under Ministry of Railway.
I am availing medical facility as per Company policy.
My question is that :
Am I eligible for availing ECHS facility ?
Waiting for your reply.
Regards
Ex-Sgt Surendra Subudhi
Ser No 693704-L
Mobile no [protected]
email id- [protected]@rediffmail.com